Removal of phenol from aqueous solutions by adsorption

Roostaei, Nadia; Tezel, F. Handan

doi:10.1016/j.jenvman.2003.11.004

Cited by 233 publications

(140 citation statements)

References 16 publications

(13 reference statements)

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“…Such an adsorption capability is higher than most common adsorbents [8], except for some activated carbons [9]. However, the adsorption for PhOH is not so effective, in comparison with other adsorbents [9,12,13].…”

Section: Adsorption Capability For Phenolsmentioning

confidence: 84%

“…They can persist for many years in the environment because of their resistance to microbiological degradation. In the last decade, various methods have been proposed to remove phenols, including catalytic oxidation [1,2], photo-oxidation [3], electrochemical oxidation [4], biological degradation [5], ultrafiltration [6] and adsorption [7][8][9][10][11][12][13][14][15]. Since the other methods need special process requirements or special catalysts, adsorption seems to be a good choice in terms of the cost and operation for the removal of phenolic compounds from wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Roostaei and Tezel investigated phenol adsorption on silica gel, activated alumina, activated carbon and zeolites, the latter two materials show a higher capacity for the adsorption of phenol [12]. Rodriguez and co-workers found that activated carbons are good adsorbents for phenol and 2,4,5-trichlorophenol [9].…”

Section: Introductionmentioning

confidence: 99%

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Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Chen

Zhang³

et al. 2009

Separation and Purification Technology

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a b s t r a c tIn this research, the removal of two phenols (4-nitrophenol and phenol) from aqueous solution was investigated using MgAl-mixed oxide. This oxide was prepared by calcining crystalline MgAl-CO 3 -layered double hydroxide (LDH) at 500 • C for 4 h. We found that it takes 10-12 h for adsorption of 4-nitrophenol to reach the equilibrium at room temperature while the equilibrium time is 20-25 h for phenol adsorption. The kinetic process of 4-nitrophenol adsorption seemingly follows the first-order reaction but phenol is adsorbed in a pseudo-second-order model. We also noted that the maximum adsorption amount of 4-nitrophenol by fitted three-parameter Langmuir-Freundlich isotherm is 367.8 mg/g, much higher than that of phenol (46.9 mg/g). The differences in the adsorption kinetics and dynamics have been related to the adsorption mechanism and adsorbate-adsorbent interactions. The reconstruction of MgAl-mixed oxide in aqueous solution incorporates 4-nitrophenolate into the interlayer. However, it is difficult to intercalate phenolate due to its weaker affinity for LDH in comparison with OH − . In addition, adsorption of MgAl-mixed oxide for 4-nitrophenol and phenol is slightly affected by the initial pH, but considerably facilitated by increasing the adsorption temperature.

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Section: Adsorption Capability For Phenolsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Chen

Zhang³

et al. 2009

Separation and Purification Technology

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“…These numbers provide compelling enough reasons for the search for cheaper adsorbents. Bentonites (Banat et al, 2000), zeolites (Roostaei and Tezel, 2004;García et al, 1993), surfactant treated smectides (Shen, 2004) and montmorillenites (Jiang et al, 2002), chitin (Dursun and Kalayci, 2005), bagasse fly ash (Srivastava et al, 2006) and organic beet pulp are some possible candidates investigated. However, lower fractional removals and adsorption capacities obtained with these adsorbents raise questions with respect to their efficiency and regeneration.…”

Section: Introductionmentioning

confidence: 99%

Capacity and mechanism of phenol adsorption on lignite

Polat

Molva

Polat

2006

International Journal of Mineral Processing

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A raw lignitic coal from Soma, Turkey was investigated to determine its potential as an adsorbent for phenol removal from wastewaters. Kinetic batch tests demonstrated that phenol could be completely removed from solution given sufficient solids loading and reaction time. The adsorption capacity of 10 mg/g obtained with the lignite is low compared to those achievable with activated carbons (around 300 mg/g). However, when normalized for the surface area, the adsorption capacity was much larger for the lignite (1.3 mg/m 2 ) than that generally observed with activated carbons (0.05-0.3 mg/m 2 ). Hydrogen-bonding of the phenolic -OH with the oxygen sites on the lignite surface is the most likely mechanism for adsorption. Though water molecules also have affinity for the same oxygen sites, lateral benzene ring interactions make phenol adsorption energetically more favorable. Since phenol molecules adsorbed in this fashion would project their benzene rings into solution, formation of a second layer through the action of the dispersive π-π interactions between the benzene rings is very likely. Residual water quality with respect to major elements and heavy metals was within acceptable limits defined by the ASTM standards. Dissolution of organic matter from the lignite was also observed to be negligible.

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“…Thus, development of suitable methods for the decontamination of phenols is necessary. Research has studied the removal of phenol from aqueous solutions, including advanced oxidation processes [5,6], biological degradation [7,8], ozonation [9,10], adsorption [11][12][13][14] [19] have been tested for adsorption of phenol and its compounds from aqueous solutions. Among them, carbon materials show significant adsorption yields.…”

mentioning

confidence: 99%

Decontamination of 4-Chloro-2-Nitrophenol from Aqueous Solution by Graphene Adsorption: Equilibrium, Kinetic, and Thermodynamic Studies

Mehrizad¹,

Gharbani²

2014

Pol. J. Environ. Stud.

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Phenol and its compounds are one of the major materials commonly used in the petrochemical, coking, coal refining, chemical, and pharmaceutical industries [1,2]. The harmful effects due to the presence of phenols in industrial wastewaters have been confirmed [3,4]. Thus, development of suitable methods for the decontamination of phenols is necessary. Research has studied the removal of phenol from aqueous solutions, including advanced oxidation processes [5,6], biological degradation [7,8], ozonation [9,10], adsorption [11][12][13][14] [19] have been tested for adsorption of phenol and its compounds from aqueous solutions. Among them, carbon materials show significant adsorption yields. This may be because of their large surface area and good distribution of pore size. Therefore, using new carbonaceous materials as adsorbents is interesting for scientists. An example of a new carbonaceous material is graphene, whose atoms are arranged in a 2D honeycomb structure [20]. As literature results show, graphene has a high adsorption capacity for removal of aqueous pollutants [21][22][23][24][25].In the present study, the potential application of graphene for 4-chloro-2-nitrophenol (4C2NP) adsorption Pol. J. Environ. Stud. Vol. 23, No. 6 (2014), 2111-2116 Original (4C2NP) is an important chemical widely used in the pharmaceuticals, herbicide, and pesticide industries. The ability of graphene to remove 4C2NP from aqueous solutions was performed as a function of contact time, amounts of adsorbent, pH, initial 4C2NP concentrations, and temperatures using a batch technique. Based on the results, the amount of 4C2NP adsorption increased with increasing initial concentration, whereas the alkaline pH range, higher graphene dosage, and higher temperature were unfavorable. Non-linear regression methods suggest that the isotherm data can be well described by the Freundlich isotherm equation. The adsorption kinetic data were analyzed using the non-linear rate equations of pseudo-first and pseudo-second order. It was found that the pseudo-second-order kinetic model was the most appropriate model, describing the adsorption kinetics. The observed changes in the standard Gibbs free energy (ΔGº), standard enthalpy (ΔHº), and standard entropy (ΔSº) show that the adsorption of 4C2NP by graphene is feasible, spontaneous, and exothermic in the temperature range 298-328 K.

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Removal of phenol from aqueous solutions by adsorption

Cited by 233 publications

References 16 publications

Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Capacity and mechanism of phenol adsorption on lignite

Decontamination of 4-Chloro-2-Nitrophenol from Aqueous Solution by Graphene Adsorption: Equilibrium, Kinetic, and Thermodynamic Studies

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